The honest answer is "it depends": on how much you study, what you already speak, and what you mean by "learn". So set those below and get a real timeline. The base figures come from the U.S. Foreign Service Institute, which puts Persian at about 1,100 hours to professional proficiency (Category III).
Persian takes about 1,100 hours of study to reach professional working proficiency (about CEFR C1) for an English speaker, according to the U.S. Foreign Service Institute. That is FSI Category III, about 3 years at 1 hour a day. Conversational B1 takes about 495 hours, 16 months at the same pace.
Time to hold a conversation (B1)
16 months
about 495 hours of study · Persian for English speakers
Estimates only. FSI hours are measured for native English speakers in intensive classroom study; the "for you" adjustment scales them by how close Persian is to your native language and script. Real timelines vary with method, motivation and exposure.
The base figure is the FSI study-hour estimate: how many classroom hours the U.S. Foreign Service Institute found a native English speaker needs to reach professional working proficiency. Persian is Category III, about 1,100 hours. That number maps to roughly CEFR C1, so the earlier levels (A1 through B2) are scaled down from it using standard CEFR effort ratios.
When you pick a different native language, the total is adjusted for linguistic distance: a language in your own family branch and sharing your writing system transfers a lot and gets easier; an unrelated language with a different script gets harder. Then your daily study time turns those hours into calendar time, since the same hours spread over more minutes a day simply finish sooner.
It's an estimate, not a guarantee. What it's genuinely good at is showing that conversational Persian arrives much sooner than "fluent", and that steady daily contact, especially reading, is what moves the timeline.
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Persian carries one of the great poetic traditions, from Rumi and Hafez to the Shahnameh of Ferdowsi, and is spoken in Iran, in Afghanistan (as Dari) and in Tajikistan (as Tajik).
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For an English speaker, the U.S. Foreign Service Institute estimates about 1,100 hours of study to reach professional working proficiency (roughly C1) in Persian, which is FSI Category III. At one hour a day that is 3 years; conversational level (B1) comes far sooner, around 16 months. Your own pace, native language and method shift the figure, which is why the calculator above lets you adjust them.
Conversational ability (CEFR B1) takes roughly 495 hours, about 16 months at an hour a day. At B1 you can handle everyday conversations, travel independently and follow the gist of simple authentic texts. Reading real Persian books with parallel translation gets you there faster because you meet useful words again and again in context.
Persian is FSI Category III, one of the harder tiers for English speakers. Persian is an Indo-European language, a distant relative of English, written right to left in an Arabic-based script with four extra letters. It has no grammatical gender and fairly regular verbs, and much of its vocabulary comes from Arabic. How hard it actually is depends heavily on the languages you already speak. A related language and shared script cut the time considerably, which the calculator reflects when you pick your native language.
Yes. The FSI hours assume classroom study; immersion and daily contact with the language compress the calendar time. The biggest levers are consistency (a little every day beats long gaps) and meeting the language in real context. Extensive reading with audio is one of the most efficient methods, because it builds vocabulary and grammatical intuition at scale.
Largely, yes. Farsi is the Persian word for the language as spoken in Iran, Dari is the name used in Afghanistan, and Tajik is the variety of Tajikistan, written in Cyrillic. They differ in accent and some vocabulary, and speakers understand each other.